Richard Shryock argues that French is the most practical language to learn While any language will be useful for some jobs or for some regions, French is a language that is useful throughout the world as well as in the U.S. French as a foreign language is the second most frequently taught language in the world after English. The International Organization of Francophonie has 56 member states and governments. Of these, 28 countries have French as an official language. French is the only language other than English spoken on five continents. When deciding on a second language for work or